Evolution of field entropy and entanglement in the intensity-dependent two-mode Jaynes-Cummings model

• 来源期刊: 中国物理（英文版）
• 关键词: degree of entanglement von Neumann entropy two-mode Jaynes-Cummings model intensity-dependent coupling
• 年，卷（期）: 2005,（5）
• 页码范围: 980-984
• 页数: 5页
• 语种: 英文

摘要

The evolution of the entanglement degree of two-mode fields and atom with the intensity-dependent coupling is investigated using von Neumann entropy. The results for the initial fields in both coherent states and two-mode squeezed vacuum state are calculated. The influence of the field.intensity on the entropy is discussed. It is found that the field and atom are generally in maximum entanglement but subject to periodic pulsed disentanglement completely under the condition of strong initial field.